isrstealer | 88f20b91f2c3982d599234935e50f60f4680b16f2c92b6081775fc6445152f5e

Analysis

max time kernel
141s
max time network
133s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
14-08-2024 15:41

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe
Size

247KB
MD5

96b3788e14a23cc2a7e1d1c5aaf40c55
SHA1

2494209949507948743fac84b280a7cf8632acca
SHA256

88f20b91f2c3982d599234935e50f60f4680b16f2c92b6081775fc6445152f5e
SHA512

3aca5861881fc38c70eacd41b06fb5186f5463fad0277cfb6652e3264dea5f65ad3a5fdf7e3b96b8bbd62001fa46a774b057ec96085fd2b64d941544e31ee1cb
SSDEEP

3072:dM8J9zo3cSWcJO4V+4RRbSrLN2LAcJEh/eAclw48y:dM8J9zog4VxSALv+h/sS

Score

10^/10

isrstealer discovery persistence stealer trojan

Malware Config

Signatures

ISR Stealer
ISR Stealer is a modified version of Hackhound Stealer written in visual basic.
trojan stealer isrstealer

ISR Stealer payload 3 IoCs

resource	yara_rule
behavioral2/memory/2324-4-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/2324-7-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer
behavioral2/memory/2324-12-0x0000000000400000-0x0000000000414000-memory.dmp	family_isrstealer

Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2170637797-568393320-3232933035-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Java Update = "C:\\Users\\Admin\\AppData\\Local\\Temp\\NhKPcZIVuuWerTmSqI.exe"	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3596 set thread context of 2324	3596	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe	93

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	vbc.exe

Suspicious behavior: EnumeratesProcesses 8 IoCs

pid	Process
2324	vbc.exe
2324	vbc.exe
2324	vbc.exe
2324	vbc.exe
2324	vbc.exe
2324	vbc.exe
2324	vbc.exe
2324	vbc.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2324	vbc.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3596 wrote to memory of 2324	3596	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe	93
PID 3596 wrote to memory of 2324	3596	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe	93
PID 3596 wrote to memory of 2324	3596	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe	93
PID 3596 wrote to memory of 2324	3596	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe	93
PID 3596 wrote to memory of 2324	3596	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe	93
PID 3596 wrote to memory of 2324	3596	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe	93
PID 3596 wrote to memory of 2324	3596	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe	93
PID 3596 wrote to memory of 2324	3596	96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe	93

C:\Users\Admin\AppData\Local\Temp\96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\96b3788e14a23cc2a7e1d1c5aaf40c55_JaffaCakes118.exe"
1⤵
- Adds Run key to start application
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:3596
- C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  C:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\vbc.exe
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  PID:2324

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=1288,i,7447299413640964517,4240724842020506306,262144 --variations-seed-version --mojo-platform-channel-handle=3884 /prefetch:8
1⤵
PID:2420

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scripting

T1064

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Scripting

T1064

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

memory/2324-4-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2324-7-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/2324-12-0x0000000000400000-0x0000000000414000-memory.dmp

Filesize
80KB

Download
memory/3596-0-0x0000000075362000-0x0000000075363000-memory.dmp

Filesize
4KB

Download
memory/3596-1-0x0000000075360000-0x0000000075911000-memory.dmp

Filesize
5.7MB

Download
memory/3596-2-0x0000000075360000-0x0000000075911000-memory.dmp

Filesize
5.7MB

Download
memory/3596-10-0x0000000075360000-0x0000000075911000-memory.dmp

Filesize
5.7MB

Download